Issue 46, 2014

Porous cobalt, nitrogen-codoped carbon nanostructures from carbon quantum dots and VB12 and their catalytic properties for oxygen reduction

Abstract

The porous cobalt, nitrogen-codoped carbon materials (Co/N/C) were synthesized by a facile one-step pyrolysis of vitamin B12 (VB12) and carbon quantum dots (CQDs). Varying the initial mass ratio of CQDs and VB12 leads to controllable concentrations of Co (0% to 3.68%) and N (0% to 5.88%) after pyrolysis. The obtained Co/N/C was evaluated by oxygen reduction reaction (ORR) in both alkaline and acid media. Particularly, the Co/N/C with 1.12% Co and 2.92% N prepared at 700 °C (Co1.12/N2.92/C-700) exhibited the best catalytic ability for ORR with a cathodic peak at −0.165 and 0.185 V (vs. SCE) in 0.1 M KOH and 0.1 M HClO4 solution, respectively, which are comparable to that of Pt/C (20%). The Co1.12/N2.92/C-700 also showed long-term stability and high methanol tolerance, which outperformed commercial Pt/C (20%).

Graphical abstract: Porous cobalt, nitrogen-codoped carbon nanostructures from carbon quantum dots and VB12 and their catalytic properties for oxygen reduction

Supplementary files

Article information

Article type
Paper
Submitted
13 Sep 2014
Accepted
15 Oct 2014
First published
16 Oct 2014

Phys. Chem. Chem. Phys., 2014,16, 25350-25357

Porous cobalt, nitrogen-codoped carbon nanostructures from carbon quantum dots and VB12 and their catalytic properties for oxygen reduction

Y. Yang, J. Liu, Y. Han, H. Huang, N. Liu, Y. Liu and Z. Kang, Phys. Chem. Chem. Phys., 2014, 16, 25350 DOI: 10.1039/C4CP04119D

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